Headers & Wire Housings – Mouser United Kingdom

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KK 254 RPC Headers

Molex KK 254 Reflow Process Compatible (RPC) Connector System supports a lead-free solder process and delivers up to 5A and 250V per circuit in a 2.54mm pitch package. KK 254 headers are designed to support RoHS lead-free initiatives. Designed with a nylon housing, the wire-to-board system can withstand temperatures up to +260°C. Molex KK 254 series connectors are ideal for use in industries such as automotive, medical, and consumer.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	Product	Type	Number of Positions	Pitch	Number of Rows	Mounting Style	Termination Style	Mounting Angle	Contact Gender	Contact Plating	Mating Post Length	Termination Post Length	Series	Tradename	Application	Minimum Operating Temperature	Maximum Operating Temperature	Packaging
Headers & Wire Housings KK Hdr RA 9 Ckt 2.54mm Pitch Sn 171857-0009 Molex 1: £0.684 760In Stock	Mfr. Part No. 171857-0009 Mouser Part No 538-171857-0009	Molex	Headers & Wire Housings KK Hdr RA 9 Ckt 2.54mm Pitch Sn Learn More about Molex kk 254 rpc headers	Datasheet	760In Stock	£0.684 £0.589 £0.539 £0.486 View £0.444 £0.368 £0.345 £0.322 £0.313	Min.: 1 Mult.: 1	Headers	Locking	9 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Tin	6.73 mm (0.265 in)	2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Bulk
Headers & Wire Housings KK Hdr RA 10 Ckt 2.54mm Pitch Sn 171857-0010 Molex 1: £0.826 1,835In Stock	Mfr. Part No. 171857-0010 Mouser Part No 538-171857-0010	Molex	Headers & Wire Housings KK Hdr RA 10 Ckt 2.54mm Pitch Sn Learn More about Molex kk 254 rpc headers	Datasheet	1,835In Stock	£0.826 £0.698 £0.669 £0.627 View £0.57 £0.512 £0.466 £0.432	Min.: 1 Mult.: 1	Headers	Locking	10 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Tin	6.73 mm (0.265 in)	2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Bulk
Headers & Wire Housings KK Hdr RA 4 Ckt 2.54mm Pitch 15um Au 171857-1004 Molex 1: £1.23 1,126In Stock	Mfr. Part No. 171857-1004 Mouser Part No 538-171857-1004	Molex	Headers & Wire Housings KK Hdr RA 4 Ckt 2.54mm Pitch 15um Au Learn More about Molex kk 254 rpc headers	Datasheet	1,126In Stock	£1.23 £1.09 £1.07 £0.986 View £0.943 £0.882 £0.818 £0.773 £0.738	Min.: 1 Mult.: 1	Headers	Locking	4 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Gold	6.73 mm (0.265 in)	2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Bulk
Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 03 Ckt Tin T&R 171857-3003 Molex 1: £0.473 4,490In Stock	Mfr. Part No. 171857-3003 Mouser Part No 538-171857-3003	Molex	Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 03 Ckt Tin T&R Learn More about Molex kk 254 rpc headers	Datasheet	4,490In Stock	Cut Tape £0.473 £0.40 £0.34 £0.291 Reel £0.274 View £0.274 £0.266 £0.264	Min.: 1 Mult.: 1 : 3,300	Headers	Locking	3 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Tin	6.73 mm (0.265 in)	2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Reel, Cut Tape
Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 06 Ckt Tin T&R 171857-3006 Molex 1: £0.856 1,220In Stock	Mfr. Part No. 171857-3006 Mouser Part No 538-171857-3006	Molex	Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 06 Ckt Tin T&R Learn More about Molex kk 254 rpc headers	Datasheet	1,220In Stock	Cut Tape £0.856 £0.759 £0.653 £0.618 Reel £0.357 View £0.566 £0.539 £0.334 £0.328	Min.: 1 Mult.: 1 : 2,700	Headers	Locking	6 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Tin	6.73 mm (0.265 in)	2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Reel, Cut Tape
Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 04 Ckt 15Au T&R 171857-4004 Molex 1: £0.908 1,466In Stock	Mfr. Part No. 171857-4004 Mouser Part No 538-171857-4004	Molex	Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 04 Ckt 15Au T&R Learn More about Molex kk 254 rpc headers	Datasheet	1,466In Stock	Cut Tape £0.908 £0.834 £0.818 £0.773 Reel £0.502 View £0.589 £0.55 £0.512 £0.501	Min.: 1 Mult.: 1 : 3,300	Headers	Locking	4 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Gold	6.73 mm (0.265 in)	2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Reel, Cut Tape
Headers & Wire Housings KK Hdr Vrt 11 Ckt 2.54mm Pitch Sn 171856-0011 Molex 1: £0.698 767In Stock	Mfr. Part No. 171856-0011 Mouser Part No 538-171856-0011	Molex	Headers & Wire Housings KK Hdr Vrt 11 Ckt 2.54mm Pitch Sn Learn More about Molex kk 254 rpc headers	Datasheet	767In Stock	£0.698 £0.588 £0.565 £0.528 View £0.48 £0.432 £0.395 £0.369 £0.361	Min.: 1 Mult.: 1	Headers	Locking	11 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Tin	7.44 mm (0.293 in)	2.34 mm (0.092 in)	171856	KK	Wire-to-Board	- 40 C	+ 105 C	Bulk
Headers & Wire Housings KK Hdr Vrt 12 Ckt 2.54mm Pitch 15um Au 171856-1012 Molex 1: £1.97 197In Stock	Mfr. Part No. 171856-1012 Mouser Part No 538-171856-1012	Molex	Headers & Wire Housings KK Hdr Vrt 12 Ckt 2.54mm Pitch 15um Au Learn More about Molex kk 254 rpc headers	Datasheet	197In Stock	£1.97 £1.73 £1.65 £1.54 View £1.40 £1.28 £1.12 £1.05	Min.: 1 Mult.: 1	Headers	Locking	12 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Gold	7.44 mm (0.293 in)	2.34 mm (0.092 in)	171856	KK	Wire-to-Board	- 40 C	+ 105 C	Bulk
Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 10 Ckt Tin T&R 171856-3010 Molex 1: £1.27 376In Stock	Mfr. Part No. 171856-3010 Mouser Part No 538-171856-3010	Molex	Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 10 Ckt Tin T&R Learn More about Molex kk 254 rpc headers	Datasheet	376In Stock	Cut Tape £1.27 £1.12 £1.07 £0.995 £0.908 Reel £0.908	Min.: 1 Mult.: 1 : 750	Headers	Locking	10 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Tin	7.44 mm (0.293 in)	2.34 mm (0.092 in)	171856	KK	Wire-to-Board	- 40 C	+ 105 C	Reel, Cut Tape
Headers & Wire Housings KK RPC 100 Hdr FrLk Vert10 Ckt 15Au T&R 171856-4010 Molex 1: £2.17 240In Stock	Mfr. Part No. 171856-4010 Mouser Part No 538-171856-4010	Molex	Headers & Wire Housings KK RPC 100 Hdr FrLk Vert10 Ckt 15Au T&R Learn More about Molex kk 254 rpc headers	Datasheet	240In Stock	Cut Tape £2.17 £1.97 £1.87 £1.74 Reel £1.31 View £1.53 £1.48 £1.22 £1.20	Min.: 1 Mult.: 1 : 750	Headers	Locking	10 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Gold	7.44 mm (0.293 in)	2.34 mm (0.092 in)	171856	KK	Wire-to-Board	- 40 C	+ 105 C	Reel, Cut Tape
Headers & Wire Housings KK Hdr RA 9 Ckt 2.54mm Pitch 15um Au 171857-1009 Molex 1: £1.91 141In Stock	Mfr. Part No. 171857-1009 Mouser Part No 538-171857-1009	Molex	Headers & Wire Housings KK Hdr RA 9 Ckt 2.54mm Pitch 15um Au Learn More about Molex kk 254 rpc headers	Datasheet	141In Stock	£1.91 £1.67 £1.43 £1.19 £0.995	Min.: 1 Mult.: 1	Headers	Locking	9 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Gold	6.73 mm (0.265 in)	2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Bulk
Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 09 Ckt Tin T&R 171857-3009 Molex 1: £0.882 590In Stock 6,300Expected 26/11/2026	Mfr. Part No. 171857-3009 Mouser Part No 538-171857-3009	Molex	Headers & Wire Housings KK RPC 100 Hdr FrLk R/A 09 Ckt Tin T&R Learn More about Molex kk 254 rpc headers	Datasheet	590In Stock 6,300Expected 26/11/2026	Cut Tape £0.882 £0.746 £0.716 £0.67 View Reel £0.505 £0.632 £0.505 £0.505	Min.: 1 Mult.: 1 : 2,100	Headers	Locking	9 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Tin		2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Reel, Cut Tape
Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 05 Ckt 15Au T&R 171857-4005 Molex 1: £1.30 689In Stock	Mfr. Part No. 171857-4005 Mouser Part No 538-171857-4005	Molex	Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 05 Ckt 15Au T&R Learn More about Molex kk 254 rpc headers	Datasheet	689In Stock	Cut Tape £1.30 £1.13 £1.08 £1.01 View Reel £0.756 £0.917 £0.841 £0.756 £0.756	Min.: 1 Mult.: 1 : 3,300	Headers	Locking	5 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Gold		2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Reel, Cut Tape
Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 11 Ckt 15Au T&R 171857-4011 Molex 1: £2.54 9In Stock	Mfr. Part No. 171857-4011 Mouser Part No 538-171857-4011	Molex	Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 11 Ckt 15Au T&R Learn More about Molex kk 254 rpc headers	Datasheet	9In Stock	Cut Tape £2.54 £2.16 £1.83 £1.65 Reel £1.42 View £1.57 £1.48 £1.41	Min.: 1 Mult.: 1 : 2,100	Headers	Locking	11 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Gold		2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Reel, Cut Tape
Headers & Wire Housings KK Hdr Vrt 11 Ckt 2.54mm Pitch 15um Au 171856-1011 Molex 1: £1.43 925In Stock Factory Special Order	Mfr. Part No. 171856-1011 Mouser Part No 538-171856-1011 Factory Special Order	Molex	Headers & Wire Housings KK Hdr Vrt 11 Ckt 2.54mm Pitch 15um Au Learn More about Molex kk 254 rpc headers	Datasheet	925In Stock	£1.43 £1.26 £1.20 £1.12 View £1.01 £0.943 £0.818 £0.788	Min.: 1 Mult.: 1	Headers	Locking	11 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Gold	7.44 mm (0.293 in)	2.34 mm (0.092 in)	171856	KK	Wire-to-Board	- 40 C	+ 105 C	Bulk
Headers & Wire Housings KK Hdr RA 7 Ckt 2.54mm Pitch 15um Au 171857-1007 Molex 1: £1.49 12In Stock Factory Special Order	Mfr. Part No. 171857-1007 Mouser Part No 538-171857-1007 Factory Special Order	Molex	Headers & Wire Housings KK Hdr RA 7 Ckt 2.54mm Pitch 15um Au Learn More about Molex kk 254 rpc headers	Datasheet	12In Stock	£1.49 £1.31 View £1.25 £1.16 £1.06 £0.969 £0.849 £0.78 £0.751	Min.: 1 Mult.: 1	Headers	Locking	7 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Gold	6.73 mm (0.265 in)	2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Bulk
Headers & Wire Housings KK Hdr Vrt 2 Ckt 2.54mm Pitch 15um Au 171856-1002 Molex 1: £0.338 31,604Expected 10/12/2026	Mfr. Part No. 171856-1002 Mouser Part No 538-171856-1002	Molex	Headers & Wire Housings KK Hdr Vrt 2 Ckt 2.54mm Pitch 15um Au Learn More about Molex kk 254 rpc headers	Datasheet	31,604Expected 10/12/2026	£0.338 £0.27 £0.252 £0.23 View £0.218 £0.203 £0.199 £0.19 £0.177	Min.: 1 Mult.: 1	Headers	Locking	2 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Gold	7.44 mm (0.293 in)	2.34 mm (0.092 in)	171856	KK	Wire-to-Board	- 40 C	+ 105 C	Bulk
Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 02 Ckt 15Au T&R 171857-4002 Molex 1: £0.711 11,314On Order	Mfr. Part No. 171857-4002 Mouser Part No 538-171857-4002	Molex	Headers & Wire Housings KK RPC 254 Hdr FrLk R/A 02 Ckt 15Au T&R Learn More about Molex kk 254 rpc headers	Datasheet	11,314On Order On Order Ship Dates Mfr. No: 171857-4002 Stock: 0 On Order: 1,414 Expected 19/11/2026 9,900 Expected 03/12/2026 Factory Lead Time: 25 Weeks	Cut Tape £0.711 Reel £0.711	Min.: 1 Mult.: 1 : 3,300	Headers	Locking	2 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Right Angle	Pin (Male)	Gold	6.73 mm (0.265 in)	2.54 mm (0.1 in)	171857	KK	Wire-to-Board	- 40 C	+ 105 C	Reel, Cut Tape
Headers & Wire Housings KK 156 PCB RtAn 12Ckt Tin Molex 09-48-1123 09-48-1123 Molex 1: £2.56 924Expected 08/04/2027	Mfr. Part No. 09-48-1123 Mouser Part No 538-09-48-1123	Molex	Headers & Wire Housings KK 156 PCB RtAn 12Ckt Tin	Datasheet	924Expected 08/04/2027	£2.56 £2.33 £2.21 £2.05 View £1.80 £1.56	Min.: 1 Mult.: 1	Headers	Socket Assembly	12 Position	3.96 mm (0.156 in)	1 Row	Board Lock	Solder Pin	Right Angle	Socket (Female)	Tin		3.68 mm (0.145 in)	171856	KK
Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 12 Ckt Tin T&R 171856-3012 Molex 1: £1.23 1In Stock	Mfr. Part No. 171856-3012 Mouser Part No 538-171856-3012	Molex	Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 12 Ckt Tin T&R Learn More about Molex kk 254 rpc headers	Datasheet	1In Stock	Cut Tape £1.23 £1.08 £1.03 £0.995 Reel £0.995	Min.: 1 Mult.: 1 : 750	Headers	Locking	12 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Tin	7.44 mm (0.293 in)	2.34 mm (0.092 in)	171856	KK	Wire-to-Board	- 40 C	+ 105 C	Reel, Cut Tape
Headers & Wire Housings KK Hdr Vrt 12 Ckt 2.54mm Pitch Sn 171856-0012 Molex 8,550: £0.397 Non-Stocked Lead-Time 27 Weeks	Mfr. Part No. 171856-0012 Mouser Part No 538-171856-0012	Molex	Headers & Wire Housings KK Hdr Vrt 12 Ckt 2.54mm Pitch Sn Learn More about Molex kk 254 rpc headers	Datasheet	Non-Stocked Lead-Time 27 Weeks	£0.397	Min.: 8,550 Mult.: 2,850	Headers	Locking	12 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Tin	7.44 mm (0.293 in)	2.34 mm (0.092 in)	171856	KK	Wire-to-Board	- 40 C	+ 105 C	Bulk
Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 04 Ckt Tin 171856-0104 Molex 22,800: £0.179 Non-Stocked	Mfr. Part No. 171856-0104 Mouser Part No 538-171856-0104	Molex	Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 04 Ckt Tin	Datasheet	Non-Stocked	£0.179	Min.: 22,800 Mult.: 11,400	Headers	Locking	4 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Tin	7.49 mm (0.295 in)	3.56 mm (0.14 in)	171856	KK	Wire-to-Board, Wire-to-Wire, Power, Signal	- 40 C	+ 105 C
Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 09 Ckt Tin 171856-0109 Molex 8,550: £0.344 Non-Stocked	Mfr. Part No. 171856-0109 Mouser Part No 538-171856-0109	Molex	Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 09 Ckt Tin	Datasheet	Non-Stocked	£0.344	Min.: 8,550 Mult.: 2,850	Headers	Locking	9 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Tin	7.49 mm (0.295 in)	3.56 mm (0.14 in)	171856	KK	Wire-to-Board, Wire-to-Wire, Power, Signal
Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 05 Ckt 30Au 171856-2005 Molex 5,700: £0.544 Non-Stocked Lead-Time 15 Weeks	Mfr. Part No. 171856-2005 Mouser Part No 538-171856-2005	Molex	Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 05 Ckt 30Au	Datasheet	Non-Stocked Lead-Time 15 Weeks	£0.544	Min.: 5,700 Mult.: 5,700			5 Position	2.54 mm (0.1 in)	1 Row		Solder Pin	Straight		Gold			171856	KK
Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 06 Ckt Tin T&R 171856-3006 Molex 1: £0.856 N/A	Mfr. Part No. 171856-3006 Mouser Part No 538-171856-3006	Molex	Headers & Wire Housings KK RPC 100 Hdr FrLk Vert 06 Ckt Tin T&R Learn More about Molex kk 254 rpc headers	Datasheet	N/A	Cut Tape £0.856 £0.78 £0.759 £0.732 £0.724 Reel £0.724	Min.: 1 Mult.: 1 : 1,050	Headers	Locking	6 Position	2.54 mm (0.1 in)	1 Row	Through Hole	Solder Pin	Straight	Pin (Male)	Tin	7.44 mm (0.293 in)	2.34 mm (0.092 in)	171856	KK	Wire-to-Board	- 40 C	+ 105 C	Reel, Cut Tape

KK 254 RPC Headers

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